Precipitation hydrated silica reactor

Abstract

This invention relates to a reaction vessel for precipitating hydrated silica, and pertains to the field of reaction apparatus technology. It includes a vessel body with a vertically rotating shaft inside. Stirring blades are fixed to the outer wall of the shaft near its lower end. A rotating pipe is coaxially fixed to the upper end of the shaft. Several nozzles communicating with the inner cavity are arranged in parallel from top to bottom on the circumferential wall of the rotating pipe. A high-pressure water source is connected to the upper end of the rotating pipe. Several exhaust steam return holes are arranged in parallel on the stirring blades, and these holes are connected to the area above the liquid surface in the vessel body via a pipe assembly. This invention solves the problems of direct emission of exhaust steam into the atmosphere during the synthesis reaction process in traditional technologies, resulting in wasted heat energy, and the use of inorganic acids in the synthesis reaction process, where the acid addition port is too high, easily forming corrosive acid mist with the exhaust steam, polluting the environment.

Description

Technical Field

[0001] This utility model relates to the field of reaction device technology, specifically to a reaction vessel for precipitating hydrated silica. Background Technology

[0002] Hydrated silica, also known as white carbon black or light silica, is mainly composed of silicon dioxide and is a white amorphous powder. Precipitated hydrated silica exhibits excellent properties, including bonding, anti-blocking, anti-caking, agglomeration, controlled release, carrier, flow aid, improved printing quality, mechanical action, special additives for thermoplastics, reinforcement, rheology control, and whitening. Surface-modified hydrophobic white carbon black is readily soluble in oil and is used as a reinforcing filler in rubber and plastics, significantly improving the mechanical strength and tear resistance of the products. Due to different manufacturing methods, the physicochemical properties and microstructure of white carbon black vary, thus their application areas and effects also differ.

[0003] The prior art discloses a patent with publication number CN107176611A, which uses conventional raw materials sodium silicate and sulfuric acid to prepare precipitated hydrated silica. The use of dispersing aids helps to accelerate the reaction process, thereby obtaining precipitated hydrated silica with a particle size distribution of 30-50nm, a whiteness of more than 98.5%, and a purity of more than 99.98%. At the same time, the precipitated hydrated silica prepared has excellent dispersibility when applied to plastics, rubber or other fields, thereby exerting its performance.

[0004] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0005] First, the reactor is designed as an atmospheric pressure vessel, and the exhaust gas from the synthesis reaction process is directly emitted into the atmosphere, resulting in a waste of thermal energy. In addition, the synthesis reaction process uses inorganic acids, and the acid addition port is too high, which easily forms corrosive acid mist with the exhaust gas, polluting the environment.

[0006] Secondly, after each product reaction cycle is completed, the scale inside the reactor needs to be cleaned using a cleaning structure. However, the cleaning structure occupies a large amount of internal space, affecting the volume of material reaction inside the reactor.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a precipitated hydrated silica reactor, which solves the problems of direct emission of exhaust gas into the atmosphere during the synthesis reaction process in traditional technologies, resulting in wasted heat energy, and the use of inorganic acids in the synthesis reaction process, where the acid addition port is too high, easily forming corrosive acid mist with the exhaust gas, thus polluting the environment.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A silica precipitation hydration reactor includes a vessel body. Inside the vessel body, a vertically rotatable shaft is mounted. Stirring blades are fixed to the outer wall of the shaft near its lower end. A rotating pipe is coaxially fixed to the upper end of the shaft. Several spray holes communicating with the inner cavity are arranged in parallel from top to bottom on the circumferential wall of the rotating pipe. The upper end of the rotating pipe is connected to a high-pressure water source.

[0011] The stirring blades are provided with a number of exhaust steam reflux holes arranged in parallel, and the exhaust steam reflux holes are connected to the area above the liquid surface of the vessel through a pipe assembly.

[0012] As an optimized solution, the upper end of the rotating tube extends above the vessel body and is rotatably fitted with a connecting cylinder, which is connected to a high-pressure water source.

[0013] As an optimized solution, a toothed ring is fixedly connected to the outer wall of the rotating tube, and a drive motor is fixedly connected to the top of the vessel body. The output end of the drive motor meshes with the toothed ring using a gear.

[0014] As an optimized solution, an acid addition port communicating with the inner cavity is fixedly connected to the outer wall of the vessel near its lower end.

[0015] As an optimized solution, a discharge cylinder communicating with the inner cavity is fixedly connected to the center position of the lower end of the vessel body.

[0016] As an optimized solution, the lower end of the rotating shaft is coaxially provided with an installation channel, the stirring blade is provided with a cavity, the exhaust steam return hole is connected to the cavity, and the cavity is connected to the installation channel.

[0017] As an optimized solution, the pipe assembly includes a bent pipe fixedly connected to the rotating insertion inside the installation channel, the inlet end of the bent pipe extending to the outside of the vessel body, and a waste steam outlet cylinder connected to the inner cavity of the vessel body fixedly connected to the outer wall above the liquid surface, the waste steam outlet cylinder being connected to the inlet end of the bent pipe through a return pipe.

[0018] As an optimized solution, a pressurizing fan is connected to the return pipeline.

[0019] As an optimized solution, the bend includes two straight pipe sections arranged on different axes, with an inclined pipe section connecting the two straight pipe sections. The upper straight pipe section is inserted into the installation channel, and the lower straight pipe section extends to the bottom of the vessel body.

[0020] As an optimized solution, a manhole is fixedly connected to the outer wall of the vessel.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The acid addition port is lowered below the liquid level at the bottom of the reactor to prevent the generation of acid mist.

[0023] A high-pressure, temperature-resistant, and corrosion-resistant pressurizing fan is installed to extract the exhaust steam above the liquid surface of the reactor and send it below the liquid surface for recycling, which is both energy-saving and environmentally friendly.

[0024] The drive motor drives the stirring blades, and the exhaust steam is evenly sprayed out through the exhaust steam return hole, which increases the uniformity of contact with the internal materials.

[0025] By setting a rotating tube coaxial with the rotating shaft, and by opening several spray holes in the rotating tube from top to bottom that connect to its inner cavity, and by connecting the upper end of the rotating tube to a high-pressure water source, the rotating tube can be used to periodically spray and clean the inner wall of the vessel with high-pressure water, thereby reducing the phenomenon of scaling.

[0026] A DN500 manhole is installed on the bottom side of the reactor to facilitate personnel access for maintenance and improve safety. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] In the diagram: 1-Bottle body; 2-Rotating shaft; 3-Rotating pipe; 4-Spray hole; 5-Connecting cylinder; 6-Gear ring; 7-Driver; 8-Stirring blade; 9-Exhaust steam return hole; 10-Installation channel; 11-Bend pipe; 12-Discharge cylinder; 13-Return pipeline; 14-Pressure blower; 15-Exhaust steam outlet cylinder; 16-Acid addition port. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0031] like Figure 1 As shown, the silica precipitation reactor includes a vessel body 1. Inside the vessel body 1, a rotating shaft 2 is vertically rotatably mounted. Stirring blades 8 are fixed to the outer wall of the rotating shaft 2 near its lower end. A rotating pipe 3 is coaxially fixed to the upper end of the rotating shaft 2. Several spray holes 4 are arranged in parallel from top to bottom on the peripheral wall of the rotating pipe 3, communicating with its inner cavity. The upper end of the rotating pipe 3 is connected to a high-pressure water source. The high-pressure water source can use a high-pressure reciprocating pump to provide a working pressure of 100 bar to 1000 bar for cleaning dirt.

[0032] Several exhaust steam reflux holes 9 are arranged in parallel on the stirring blades 8. The exhaust steam reflux holes 9 are connected to the area above the liquid surface of the vessel body 1 through a pipe group.

[0033] The upper end of the rotating tube 3 extends to the top of the vessel body 1 and is rotatably fitted with a connecting tube 5, which is connected to a high-pressure water source.

[0034] A gear ring 6 is fixedly connected to the outer wall of the rotating tube 3, and a drive motor 7 is fixedly connected to the top of the vessel body 1. The output end of the drive motor 7 meshes with the gear ring 6 using gears.

[0035] An acid addition port 16, which connects to the inner cavity of the vessel body 1, is fixedly connected to the outer wall near the lower end.

[0036] A discharge cylinder 12, which communicates with the inner cavity, is fixedly connected to the center of the lower end of the vessel body 1.

[0037] The lower end of the rotating shaft 2 is coaxially provided with an installation channel 10, the stirring blade 8 is provided with a cavity, the exhaust steam return hole 9 is connected to the cavity, and the cavity is connected to the installation channel 10.

[0038] The pipe assembly includes a bent pipe 11 fixedly connected to a rotating insert inside the installation channel 10. The inlet end of the bent pipe 11 extends to the outside of the vessel body 1. A waste steam outlet cylinder 15, which communicates with the inner cavity of the vessel body 1, is fixedly connected to the outer wall of the vessel body 1 above the liquid surface. The waste steam outlet cylinder 15 is connected to the inlet end of the bent pipe 11 through a return pipe.

[0039] A pressurizing fan 14 is connected to the return line 13, and a check valve can be installed on the return line 13.

[0040] The bend 11 includes two straight pipe sections with different axes and an inclined pipe section connecting the two straight pipe sections. The upper straight pipe section is inserted into the installation channel 10, and the lower straight pipe section extends to the bottom of the vessel body 1 to avoid the discharge cylinder 12 and ensure that the discharge cylinder 12 can be located in the center of the vessel body 1 for easy material discharge.

[0041] A manhole is fixedly attached to the outer wall of the vessel body 1.

[0042] Sealing rings are provided between the straight pipe section and the installation channel 10, as well as between the connecting cylinder 5 and the upper port of the rotating pipe 3.

[0043] The other structures in the vessel body 1 are well-known in the field and are not innovative in this solution, so they will not be described in detail here.

[0044] The working principle of this device is as follows:

[0045] Lower the acid addition port 16 below the liquid level at the bottom of the reactor to prevent the generation of acid mist.

[0046] A high-pressure, temperature-resistant, and corrosion-resistant pressurizing fan 14 is installed to extract the exhaust steam above the liquid surface of the reactor and send it below the liquid surface for recycling, which is both energy-saving and environmentally friendly.

[0047] The drive motor 7 drives the stirring blades 8, and the exhaust steam is evenly sprayed out through the exhaust steam return hole 9, which increases the uniformity of contact with the internal materials.

[0048] By setting a rotating pipe 3 coaxial with the rotating shaft 2, and by opening several spray holes 4 in parallel from top to bottom of the rotating pipe 3 to connect to its inner cavity, and by connecting the upper end of the rotating pipe 3 to a high-pressure water source, the rotating pipe 3 is rotated to use high-pressure water to periodically spray and clean the inner wall of the vessel 1, thereby reducing the phenomenon of scaling.

[0049] A DN500 manhole is installed on the bottom side of the reactor to facilitate personnel access for maintenance and improve safety.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A reactor for the precipitation of hydrated silica, characterized in that: The vessel includes a vessel body (1), inside which a rotating shaft (2) is vertically rotatably mounted. Stirring blades (8) are fixedly connected to the outer wall of the rotating shaft (2) near its lower end. A rotating pipe (3) is coaxially fixed to the upper end of the rotating shaft (2). Several spray holes (4) communicating with the inner cavity are arranged side-by-side on the circumferential wall of the rotating pipe (3). The upper end of the rotating pipe (3) is connected to a high-pressure water source. Several exhaust steam return holes (9) are arranged in parallel on the stirring blade (8), and the exhaust steam return holes (9) are connected to the area above the liquid surface of the vessel body (1) through a pipe group.

2. The precipitation hydration silica reaction vessel of claim 1, wherein: The upper end of the rotating tube (3) extends above the vessel body (1) and is rotatably fitted with a connecting tube (5), which is connected to a high-pressure water source.

3. The precipitation hydration silica reaction vessel of claim 1, wherein: A toothed ring (6) is fixedly connected to the outer wall of the rotating tube (3), and a drive motor (7) is fixedly connected to the top of the vessel body (1). The output end of the drive motor (7) meshes with the toothed ring (6) using gears.

4. The precipitation hydration silica reaction vessel of claim 1, wherein: An acid-adding port (16) is fixedly connected to the outer wall of the vessel (1) near the lower end, which communicates with its inner cavity.

5. The precipitation hydration silica reaction vessel of claim 1, wherein: The lower end of the vessel body (1) is fixedly connected to the center of the discharge cylinder (12) that communicates with its inner cavity.

6. The precipitated hydrated silica reactor of claim 1, wherein: The lower end of the rotating shaft (2) is coaxially provided with an installation channel (10), the stirring blade (8) is provided with a cavity, the exhaust steam return hole (9) is connected to the cavity, and the cavity is connected to the installation channel (10).

7. The precipitated hydrated silica reactor of claim 6, wherein: The tube assembly includes a bent tube (11) fixedly connected to the rotating insertion inside the installation channel (10). The inlet end of the bent tube (11) extends to the outside of the vessel body (1). A waste steam outlet tube (15) communicating with its inner cavity is fixedly connected to the outer wall of the vessel body (1) above the liquid surface. The waste steam outlet tube (15) is connected to the inlet end of the bent tube (11) through a return pipe.

8. The precipitated hydrated silica reactor of claim 7, wherein: A pressurizing fan (14) is connected to the return line (13).

9. The precipitated hydrated silica reactor of claim 7, wherein: The bend (11) includes two straight pipe sections with different axes and an inclined pipe section connecting the two straight pipe sections. The upper straight pipe section is inserted into the installation channel (10), and the lower straight pipe section extends to the bottom of the vessel body (1).

10. The precipitation hydration silica reaction vessel of claim 1, wherein: A manhole is fixed to the outer wall of the vessel body (1).

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